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https://github.com/taigrr/nats.docs
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147 lines
6.0 KiB
HTML
147 lines
6.0 KiB
HTML
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<div class="tab-wrap">
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<input type="radio" id="subscribe_queue_go" name="subscribe_queue" class="tab" checked>
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<label for="subscribe_queue_go" class="api-lang" data-language="go">Go</label>
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<input type="radio" id="subscribe_queue_java" name="subscribe_queue" class="tab">
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<label for="subscribe_queue_java" class="api-lang" data-language="java">Java</label>
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<input type="radio" id="subscribe_queue_js" name="subscribe_queue" class="tab">
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<label for="subscribe_queue_js" class="api-lang" data-language="js">JavaScript</label>
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<input type="radio" id="subscribe_queue_py" name="subscribe_queue" class="tab">
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<label for="subscribe_queue_py" class="api-lang" data-language="py">Python</label>
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<input type="radio" id="subscribe_queue_ruby" name="subscribe_queue" class="tab">
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<label for="subscribe_queue_ruby" class="api-lang" data-language="ruby">Ruby</label>
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<input type="radio" id="subscribe_queue_ts" name="subscribe_queue" class="tab">
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<label for="subscribe_queue_ts" class="api-lang" data-language="ts">TypeScript</label>
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<div class="tab__content">
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<pre id="subscribe_queue_go_content"><a class="toolbar-icons pull-right" target="_blank" href="https://github.com/nats-io/go-nats-examples/blob/master/api-examples/subscribe_queue/main.go#L11-34"><i class="mdi mdi-github-circle" title="View on GitHub"></i></a><a class="toolbar-icons pull-right"><i class="mdi mdi-content-copy js-copy" title="Copy to Clipboard"></i></a><span class="copy-msg pull-right"></span><code class="language-go">nc, err := nats.Connect("demo.nats.io")
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if err != nil {
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log.Fatal(err)
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}
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defer nc.Close()
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// Use a WaitGroup to wait for 10 messages to arrive
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wg := sync.WaitGroup{}
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wg.Add(10)
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// Create a queue subscription on "updates" with queue name "workers"
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if _, err := nc.QueueSubscribe("updates", "worker", func(m *nats.Msg) {
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wg.Done()
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}); err != nil {
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log.Fatal(err)
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}
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// Wait for messages to come in
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wg.Wait()
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// Close the connection
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nc.Close()
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</code></pre>
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</div>
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<div class="tab__content">
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<pre id="subscribe_queue_java_content"><a class="toolbar-icons pull-right" target="_blank" href="https://github.com/nats-io/java-nats-examples/blob/master/src/main/java/io/nats/examples/SubscribeQueue.java#L14-35"><i class="mdi mdi-github-circle" title="View on GitHub"></i></a><a class="toolbar-icons pull-right"><i class="mdi mdi-content-copy js-copy" title="Copy to Clipboard"></i></a><span class="copy-msg pull-right"></span><code class="language-java">Connection nc = Nats.connect("nats://demo.nats.io:4222");
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// Use a latch to wait for 10 messages to arrive
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CountDownLatch latch = new CountDownLatch(10);
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// Create a dispatcher and inline message handler
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Dispatcher d = nc.createDispatcher((msg) -> {
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String str = new String(msg.getData(), StandardCharsets.UTF_8);
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System.out.println(str);
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latch.countDown();
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});
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// Subscribe
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d.subscribe("updates", "workers");
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// Wait for a message to come in
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latch.await();
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// Close the connection
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nc.close();
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</code></pre>
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</div>
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<div class="tab__content">
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<pre id="subscribe_queue_js_content"><a class="toolbar-icons pull-right" target="_blank" href="https://github.com/nats-io/node-nats-examples/blob/master/src/subscriber_samples.js#L213-220"><i class="mdi mdi-github-circle" title="View on GitHub"></i></a><a class="toolbar-icons pull-right"><i class="mdi mdi-content-copy js-copy" title="Copy to Clipboard"></i></a><span class="copy-msg pull-right"></span><code class="language-javascript">let nc = NATS.connect({
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url: "nats://demo.nats.io:4222"});
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nc.subscribe('updates', {queue: "workers"}, (msg) => {
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t.log('worker got message', msg);
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});
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</code></pre>
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</div>
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<div class="tab__content">
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<pre id="subscribe_queue_py_content"><a class="toolbar-icons pull-right" target="_blank" href="https://github.com/nats-io/asyncio-nats-examples/blob/master/subscribe_queue.py#L6-23"><i class="mdi mdi-github-circle" title="View on GitHub"></i></a><a class="toolbar-icons pull-right"><i class="mdi mdi-content-copy js-copy" title="Copy to Clipboard"></i></a><span class="copy-msg pull-right"></span><code class="language-python">nc = NATS()
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await nc.connect(servers=["nats://demo.nats.io:4222"])
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future = asyncio.Future()
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async def cb(msg):
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nonlocal future
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future.set_result(msg)
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await nc.subscribe("updates", queue="workers", cb=cb)
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await nc.publish("updates", b'All is Well')
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msg = await asyncio.wait_for(future, 1)
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print("Msg", msg)
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</code></pre>
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</div>
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<div class="tab__content">
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<pre id="subscribe_queue_ruby_content"><a class="toolbar-icons pull-right" target="_blank" href="https://github.com/nats-io/ruby-nats-examples/blob/master/subscribe_queue.rb#L1-21"><i class="mdi mdi-github-circle" title="View on GitHub"></i></a><a class="toolbar-icons pull-right"><i class="mdi mdi-content-copy js-copy" title="Copy to Clipboard"></i></a><span class="copy-msg pull-right"></span><code class="language-ruby">require 'nats/client'
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require 'fiber'
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NATS.start(servers:["nats://127.0.0.1:4222"]) do |nc|
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Fiber.new do
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f = Fiber.current
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nc.subscribe("updates", queue: "worker") do |msg, reply|
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f.resume Time.now
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end
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nc.publish("updates", "A")
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# Use the response
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msg = Fiber.yield
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puts "Msg: #{msg}"
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end.resume
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end
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</code></pre>
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</div>
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<div class="tab__content">
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<pre id="subscribe_queue_ts_content"><a class="toolbar-icons pull-right" target="_blank" href="https://github.com/nats-io/ts-nats-examples/blob/master/src/subscriber_samples.ts#L193-197"><i class="mdi mdi-github-circle" title="View on GitHub"></i></a><a class="toolbar-icons pull-right"><i class="mdi mdi-content-copy js-copy" title="Copy to Clipboard"></i></a><span class="copy-msg pull-right"></span><code class="language-javascript">await nc.subscribe('updates', (err, msg) => {
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t.log('worker got message', msg.data);
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}, {queue: "workers"});
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</code></pre>
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</div>
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</div>
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